Brookfield Zoo is set within a 216-acre nature park. World-renowned, the Zoo’s 2,000+ residents have captivated and educated visitors since 1934. Don’t forget to take in Dolphins in Action at Seven Seas! Open 365 days a year, 10am to 5pm. Admission is Adults $19.85; Seniors (65 and Over) $14.50; and Children (3 to 11) $14.50; children under 2 are free. Motor coach and tour bus operator pricing for groups of 20+ is available. Brookfield Zoo is located at First Ave and 31st St. in Brookfield, just 12 miles west of downtown Chicago. The zoo is accessible via the Stevenson (I-55) and Eisenhower (I-290) expressways, Tri-State tollway (I-294), Metra train and PACE bus service. Brookfield Zoo is owned by the Forest Preserve District of Cook County and managed by the Chicago Zoological Society. The mission of the Chicago Zoological Society is to inspire conservation leadership by connecting people with wildlife and nature.